Can some one tell me the position the prop should be relative to TDC for the DLE55 ENGINE, need to drill the holes for prop but want to make sure it is in the correct position for hand starting, thanks.

Drill the hole square make two perpendicular line one of the line need to pass each tip of the prop blade. the compression start when the prop are at 2 o"clock, normally if you doinged in that way.
also if your engine shut down in the air the prop remain in horizontal position to avoid any damageg during the landing.

You can drill the holes anywhere you want to and you have 100% chance of getting a blade between 12 o'clock and 3 o'clock. Very little chance of getting a blade exacltly at 12 or 3. So it will in between 99% of the time anyway.